Caught in the Act!

 Birthday boy Mark Wahlberg, celebrating his 36th with a
round of golf and his own entourage of friends on the green at Wilshire
Country Club in Los Angeles.

 Princess Fiona just had to see the castle. Cameron Diaz, in Paris to promote Shrek the Third, and a friend took off to visit the Château de Versailles. The pair passed practically unnoticed as they toured the celebrated Galerie des Glaces. And there was more culture on the agenda: Diaz, in a white T-shirt, gold necklace and jeans, returned to Paris and hit the L'Orangerie in the Tuileries Gardens. Afterward, Diaz made a private visit to the Musée d'Orsay, which stayed open after regular hours for her.

 How to cool off on a hot day in the Valley? Go ice-skating, of
course. Nicole Richie, clad in jeans, a beige top and white hat
drove up to the Culver City Ice Arena in her black Mercedes G Wagon.
According to a source, the Simple Life star met up with a
girlfriend – and then the two hit the ice.

 Dave Navarro, digging into a guitar-shaped birthday cake
during an early 40th birthday celebration at Body English in Las Vegas' Hard
Rock Hotel. The rocker – whose actual birthday is June 7 – partied
hard. An onlooker tells us: "He smoked about two packs of cigarettes." Earlier in the night, the hotel offered Navarro the ultimate birthday gift – dedicating a glass case featuring his personal items.

Body English

Courtesy Hard Rock Hotel & Casino

 Entourage star Adrian Grenier, partying with
pals at Hollywood hotspot Winston's. The reserved star sat with his group of
friends – and later in the night, he greeted model-actress Sofia
Vergara when she arrived.